python-typing-3.6.4-2.1

- specfile:
  * update copyright year
- update to version 3.6.4:
  * no changelog available

- Update to version 3.6.2
- Dropped mod_generics_cache.py (now supplied upstream)

- fix build in python2-only environments

- only build for python3<3.5

- Fix license formatting

- The last update broke packaging due to dysfunctional testing.
  Provide the missing module from upstream.

- Update to 3.6.1
  * Uses python 3.6 version.
- Implement single-spec version
  Note: Some packages require this even on python 3.6.x

- initial packaging of release 3.5.2.2